标题： 两个致密天体的径向下落：2.5PN线动量通量及相关的反冲 显示英文标题

标题： Radial infall of two compact objects: 2.5PN linear momentum flux and associated recoil

摘要： 二元系统由致密天体组成（在相互引力作用下径向相互靠近），通过多极后闵可夫斯基方法研究了线性动量的损失率。 提供了用于线性动量通量的2.5PN精确解析公式，以两个物体的分离距离为基准，在协调坐标中，适用于有限和无限初始分离的情况。 最终使用了线性动量通量的2.5PN公式来估计二元演化预合并阶段累积的反冲速度。 显示英文摘要

摘要： The loss rate of linear momentum from a binary system composed of compact objects (radially falling towards each other under mutual gravitational influence) has been investigated using the multipolar post-Minkowskian approach. The 2.5PN accurate analytical formula for the linear momentum flux is provided, in terms of the separation of the two objects, in harmonic coordinates, both for a finite and infinite initial separation. The 2.5PN formulas for the linear momentum flux are finally used to estimate the recoil velocity accumulated during a premerger phase of the binary evolution.